| TAF amendment response time results by issuing office for July 2011 | ||||||||
| EC Weather Centre Location | Number of observations not covered by current TAF | Number responded to by an amended TAF | Number responded to by next regular TAF | Number where weather changed back to match TAF | Number where weather and TAF remained inconsistent | Average response time in minutes | Percentage of TAF responses within 20 minutes | Number of proactive amendments |
| Montreal | 1827 | 1114 | 152 | 551 | 10 | 19 | 63% | 1377 |
| Edmonton | 1564 | 914 | 131 | 485 | 34 | 19 | 78% | 1404 |
| National | 3391 | 2028 | 283 | 1036 | 44 | 19 | 69% | 2781 |